You can unlock the Motorola XOOM bootloader using the "fastboot oem unlock" easily and of course thanks to the Android enthusiasts from XDA forum because of them to unlock the Motorola XOOM bootloader is possible. And in this post I have elaborated the steps for you to follow.

Words for cautious before going:

1. This unlocking will deprive your new XOOM. That means you will negate to upgrade to 4G LTE, however no confirmation on this yet.